4 Practical Approaches To Minimize Voltage Drop Problems (photo credit: lhcb-elec.web.cern.ch)
What NEC states for max. voltage drop?
The NEC states in an Informational Note that a maximum voltage drop of 3% for branch circuit conductors, and 5% for feeder and branch circuit conductors together, will provide reasonable efficiency of operation for general use circuits.
For sensitive electronic loads, circuits should be designed for a maximum of 1.5% voltage drop for branch circuits at full load, and 2.5% voltage drop for feeder and branch circuits combined at full load.
Four practical approaches can be used to minimize voltage drop problems:
- Increasing the number or size of conductors
- Reducing the load current on the circuit
- Decreasing conductor length, and
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